According to Greek mythology it is a sea monster that was previously a beautiful nymph daughter of Forcis and Keto.

There are several descriptions about this monster. Some consider that it was a creature with torso of woman and fish tail of whose waist they left six dogs of two legs each. For others, it was a being with six necks and six heads with sharp teeth. There is also another version that mixes elements of both.

Scylla crossed the Straits of Messina (separation between Italy and Sicily) along with Charybdis, another sea monster, which forced the boats to approach and face one or the other being to cross the pass.

Subsequently, Scylla was converted by the gods into a dangerous rock, which still exists today, and complicates the passage of ships.